Penobscot, ME
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.
Environmental data for Penobscot in Maine · Population: 153,571
Penobscot, ME is tracked across three EPA datasets covering 6 Toxics Release Inventory (TRI) facilities, 51 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 38/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 536.7K lbs of reported toxic releases under EPCRA Section 313, while 12 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 33 and a peak AQI of 84 in 2024, with 91% of observed days rated "Good" (0–50).
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 328 (91%) | 34 | 0 | 84 |
| 2023 | 294 (82%) | 64 | 0 | 89 |
| 2022 | 324 (90%) | 37 | 0 | 87 |
| 2021 | 326 (90%) | 36 | 0 | 100 |
| 2020 | 338 (93%) | 25 | 0 | 76 |
Source: EPA Air Quality System (AQS) Annual AQI by County EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Maine, see the EPA's AirNow.gov.
Water Systems (51)
| System | Population | Violations |
|---|---|---|
| BANGOR WATER DISTRICT | 27,298 | 0 |
| BREWER WATER DEPARTMENT | 8,860 | 2 |
| OLD TOWN WATER DISTRICT | 7,648 | 0 |
| ORONO-VEAZIE WATER DISTRICT | 5,793 | 0 |
| HAMPDEN WATER DISTRICT | 4,628 | 1 |
| LINCOLN WATER DISTRICT | 3,020 | 0 |
| DEXTER UTILITY DISTRICT | 2,338 | 2 |
| EAST MILLINOCKET WATER WORKS | 2,133 | 0 |
| NEWPORT WATER DISTRICT | 1,900 | 0 |
| HOWLAND WATER DEPARTMENT | 1,025 | 0 |
| MOUNTAIN VIEW CORRECTIONAL FACILITY | 468 | 0 |
| PATTEN WATER DEPT | 338 | 0 |
| SUN HANCOCK HEIGHTS- EAST | 158 | 2 |
| COUNTRY MOBILE HOME PARK | 155 | 0 |
| SUN HANCOCK HEIGHTS-WEST | 155 | 0 |
| PLYMOUTH WATER DISTRICT | 150 | 0 |
| DOVER REALTY VENTURES MHP LLC | 145 | 0 |
| HINGHAM HEIGHTS | 140 | 6 |
| HOMESTEAD ESTATES LLC | 125 | 2 |
| GRANDEUR MOBILE HOME ESTATES | 100 | 0 |
| SOUTH SLOPE ESTATES MHP | 100 | 0 |
| EVERGREEN COMMUNITY MH PARK | 90 | 0 |
| WOODED GROVE MOBILE HOME PARK | 90 | 0 |
| WHIPPOORWILL HILL MOBILE HOME | 85 | 0 |
| CORINNA WATER DISTRICT | 80 | 0 |
| WINDSWEPT ESTATES MH PARK | 75 | 0 |
| WILLOWBROOK MOBILE HOME PARK | 75 | 0 |
| HAVASU PINES MHP | 75 | 0 |
| SCROGGINS MOBILE HOME PARK | 73 | 0 |
| MAPLEWOOD MOBILE HOME PARK | 70 | 0 |
| HAVASU PINES MHP #1 | 65 | 0 |
| STREETS MOBILE HOME PARK | 65 | 0 |
| ROCKY RIDGE SUBDIVISION | 64 | 0 |
| BOULIER PLACE APTS | 60 | 2 |
| CORINTHIAN MANOR | 60 | 0 |
| DEER RUN APTS | 60 | 0 |
| SUNNY GABLES- GLENBURN HOUSING | 60 | 6 |
| TOWNE CENTER-RIDGEWOOD APARTMENTS | 60 | 0 |
| PERSISTENCE SENIORS HOUSING | 60 | 0 |
| FAIRGROUND APARTMENTS | 60 | 0 |
| TOWN HALL APTS - LAGRANGE | 60 | 0 |
| VIGNEAULTS MOBILE HOME PARK | 53 | 0 |
| GEORGE POND ESTATES LLC | 50 | 2 |
| GREENWOOD GARDEN APARTMENTS | 50 | 3 |
| HARRIMAN COVE PARK LLC | 45 | 0 |
| BENJAMIN RIVER APTS | 45 | 1 |
| ROCKY RIDGE SUBDIVISION II | 40 | 0 |
| FAITH BIBLE COLLEGE INTERNATIONAL | 35 | 0 |
| MATTAWAMKEAG HOUSING CORP | 33 | 1 |
| SKYLINE TRAILER PARK | 28 | 0 |
| EXETER WATER DEPARTMENT | 25 | 0 |
TRI Facilities (6)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Nd Paper Inc. | 525.9K lbs |
| 2 | Eldur Corp | 6.9K lbs |
| 3 | Ge Vernova Bangor | 3.1K lbs |
| 4 | Ge Vernova Bangor | 707 lbs |
| 5 | U.S. Army Maine National Guard Bangor Training Site Range | 27 lbs |
| 6 | Brenntag Lubricants North East-Hampden | 0 lbs |
Cities in Penobscot (3)
Frequently Asked Questions
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What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.